cris.t wrote:

ok for sanding, i can try. but the real problem is the fire button. i'm able to mount it only by removing the ss part from the tube. anyway it is really really tight.

for put the chip inyou have to use a kind of "angle" with the button of the chip touching the Atto Steel button.

about sanding down the negative contact on the chip,you can take quite some,me i do based on the height of other component around.

if really problem for fit the chip due to diamùeter,carefully sand OD of the chip,but really not much.

also a thing i have do on my two chip,is that i added some UV glue on the legs of the fire button,for make it more firm and less prone to fatigue.
i trimed a little the UV glue for the perfect fit with Xacto blade as exemple